Activation of C-fiber nociceptors by low-power diode laser
ABSTRACT Objective The evaluation of selective activation of C-fibers to record evoked potentials using the association of low-power diode laser (810 nm), tiny-area stimulation and skin-blackening. Method Laser-evoked potentials (LEPs) were obtained from 20 healthy young subjects. An aluminum pl...
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| Format: | Article |
| Language: | English |
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Thieme Revinter Publicações
2016-03-01
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| Series: | Arquivos de Neuro-Psiquiatria |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X2016000300009&lng=en&tlng=en |
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| _version_ | 1849691210579443712 |
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| author | Eduardo Azevedo Andressa Silva Raquel Martins Monica L. Andersen Sergio Tufik Gilberto M. Manzano |
| author_facet | Eduardo Azevedo Andressa Silva Raquel Martins Monica L. Andersen Sergio Tufik Gilberto M. Manzano |
| author_sort | Eduardo Azevedo |
| collection | DOAJ |
| description | ABSTRACT Objective The evaluation of selective activation of C-fibers to record evoked potentials using the association of low-power diode laser (810 nm), tiny-area stimulation and skin-blackening. Method Laser-evoked potentials (LEPs) were obtained from 20 healthy young subjects. An aluminum plate with one thin hole was attached to the laser probe to provide tiny-area stimulation of the hand dorsum and the stimulated area was covered with black ink. Results The mean intensity used for eliciting the ultra-late laser-evoked potential (ULEP) was 70 ± 32 mW. All subjects showed a clear biphasic potential that comprised a negative peak (806 ± 61 ms) and a positive deflection (1033 ± 60 ms), corresponding to the ULEP related to C-fiber activation. Conclusion C-fiber-evoked responses can be obtained using a very low-power diode laser when stimulation is applied to tiny areas of darkened skin. This strategy offers a non-invasive and easy methodology that minimizes damage to the tissue. |
| format | Article |
| id | doaj-art-e293fd00f54b4231a5f3457ce9906305 |
| institution | DOAJ |
| issn | 1678-4227 |
| language | English |
| publishDate | 2016-03-01 |
| publisher | Thieme Revinter Publicações |
| record_format | Article |
| series | Arquivos de Neuro-Psiquiatria |
| spelling | doaj-art-e293fd00f54b4231a5f3457ce99063052025-08-20T03:21:06ZengThieme Revinter PublicaçõesArquivos de Neuro-Psiquiatria1678-42272016-03-0174322322710.1590/0004-282X20160018S0004-282X2016000300009Activation of C-fiber nociceptors by low-power diode laserEduardo AzevedoAndressa SilvaRaquel MartinsMonica L. AndersenSergio TufikGilberto M. ManzanoABSTRACT Objective The evaluation of selective activation of C-fibers to record evoked potentials using the association of low-power diode laser (810 nm), tiny-area stimulation and skin-blackening. Method Laser-evoked potentials (LEPs) were obtained from 20 healthy young subjects. An aluminum plate with one thin hole was attached to the laser probe to provide tiny-area stimulation of the hand dorsum and the stimulated area was covered with black ink. Results The mean intensity used for eliciting the ultra-late laser-evoked potential (ULEP) was 70 ± 32 mW. All subjects showed a clear biphasic potential that comprised a negative peak (806 ± 61 ms) and a positive deflection (1033 ± 60 ms), corresponding to the ULEP related to C-fiber activation. Conclusion C-fiber-evoked responses can be obtained using a very low-power diode laser when stimulation is applied to tiny areas of darkened skin. This strategy offers a non-invasive and easy methodology that minimizes damage to the tissue.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X2016000300009&lng=en&tlng=enpotenciais evocados a laserfibras Cnocicepçãopercepção dolorosa |
| spellingShingle | Eduardo Azevedo Andressa Silva Raquel Martins Monica L. Andersen Sergio Tufik Gilberto M. Manzano Activation of C-fiber nociceptors by low-power diode laser Arquivos de Neuro-Psiquiatria potenciais evocados a laser fibras C nocicepção percepção dolorosa |
| title | Activation of C-fiber nociceptors by low-power diode laser |
| title_full | Activation of C-fiber nociceptors by low-power diode laser |
| title_fullStr | Activation of C-fiber nociceptors by low-power diode laser |
| title_full_unstemmed | Activation of C-fiber nociceptors by low-power diode laser |
| title_short | Activation of C-fiber nociceptors by low-power diode laser |
| title_sort | activation of c fiber nociceptors by low power diode laser |
| topic | potenciais evocados a laser fibras C nocicepção percepção dolorosa |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X2016000300009&lng=en&tlng=en |
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